A wants 2 yuan money.

B is (1.8) yuan.

C costs (2) yuan, so it is more cost-effective to go to store (b).

2. Which store is cheaper to buy large bottles of drinks?

A (10) Yuan B (9) Yuan C (10) Yuan B Store is more cost-effective.

Naughty wants to buy three big bottles of drinks and three small bottles of drinks. Which store will he go to?

Answer: I'm going to Bic Store because of A 30, B 32.4 and C 28.8.

4. For class parties, 200ML drinks should be prepared for delicious students. If there are 35 students attending the party, which store is more cost-effective?

35× 200 = 7000ml

A: 7000ml=50.

B: 7000ml=54。

C: 7000ml=48

A: shop C.